Lock.



No. 640,956. v Pa tented Jan. 9, [900.

E. SABGENT.

LOCK.

(Application filed Jan. 19, 1897.)

(No Model.)

" STATES PATENT FFICE.

EDWARD SARGENT, OF NEW LISBON, WISCONSIN, ASSIGNOR TO CHARLES A. LEIOHT,OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters IPatent N 0. 640,956, datedJanuary 9, 1900. Application filed January 19,1897- Serial No. 619,824.No model.)

To aZZ whom it may concern.-

Be it known that I, EDWARD SARGENT, a citizen of the United States,residing at New Lisbon, in the county of Juneau and State of Wisconsin,have invented a new and useful Improvementin Mortise Door-Locks, ofwhich the following is a specification.

My invention relates to an improvement in mortise door-locks in which Iabandon springs and make use of a pendent weight combined with avertical curved locking-bar.

The object of this invention is to produce a lock that willautomatically lock by gravity.

Furthermore, the object of the invention is to produce means for causinga positive action of the locking-bolt when released.

A further object of the invention is the production of a lock which willprove strong, durable, and efficient and at the same time comparativelyinexpensive,sinceit is of few parts, which are readily removable shouldit be necessary to renew those worn or broken.

With the above and other objects in view the invention consists in thedetails of construction, as well as in the arrangement and combinationof parts, to be hereinafter more fully set forth, and specificallypointed out in the claims. Y

In describing the invention in detail reference will be had to theaccompanying drawings, forming part of this specification,wherein likecharacters of reference denote corresponding parts in both views, inwhich- Figure 1 is a plan view of my lock with the casing on one sideremoved. Fig. 2 is avertical sectional View on the line 0 P of Fig. 1.

In the drawings, A denotes a pendant hav ing formed therewith anapertured' head 11 to receive the door-spindle F. A stud d is formed onthe pendant and is adapted to en? gage the pinion D and elevate it asthe pendant is elevated from its normal position, as shown in Fig. 1, itbeing understood that as the pendant is elevated to the position shownin dotted lines the pinion will be partially rotated, thus actuating thelocking bolt B through the toothed rack, which is engaged by the pinion.Should the pendantbe turned, as indicated in dotted lines, thelocking-bolt will be drawn up and the lower end thereof will be broughtWithin the casing. Frictionrolls a a operate in slots 1 of thelocking-bolt, as will be apparent.

The locking-bolt is provided with a notch on its upper edge to receive agravitating detent C, said detent consisting of a body having slots 2 toreceive the friction-rolls a a, similar to those employed in connectionwith the locking-bolt. In the lower edge of the detent I provide anotch, forming a wall or shoulder against which the key operates towithdraw the nose of the detent from engage ment with the locking-bolt,it being under stood that said detent automatically operates to engagethe bolt by reason of gravity.

In practice it has been found desirable to secure the detent in itsposition either to en gage the bolt or in its elevated position out ofengagement therewith. This I accomplish by a thumb-screw which binds thedetent to the lock-casing. For instance, should it be desirable to lockthe door from the inside the detent can be dropped into position withthe locking-bolt, and after the screw is tightened the key cannotoperateit. Likewise if it is found desirable to have the door opened bysimply turning the knob the detent can be secured in its elevatedposition in the same manner, when the locking-bolt will be free tooperate.

The operation and advantages will, it is thought, be understood, itbeing noted that changes in the details of construction may be resortedto without departing from the spirit of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is- I 1. In combination, a pendant havingaspimdie-barrel, a pinion mounted on the barrel, a stud on the pendant foractuating the pinion, a gravity-bolt having a rack engaged by thepinion, said bolt having slots to receive friction-rolls operating inslots, a detent having slots, friction-rolls operating in the slots,said its upper edge, a gravitating detent engaging detent being notchedto receive a key as and a notch of the locking-bar, said detent hav- [0for the purpose described. ing a notch to receive a key, as and for the2. In combination, a pendant having a spinpurpose specified. 5die-barrel, a spindle for operating the pend- EDWARD SARGENT.

ant, a pinion mounted on the barrel, a stud Witnesses: on the pendant toengage the edge of the pin- A. D. FoLsoM,

I ion, a curved locking-bolt having a rack on I GEO. H. KROHMER.

